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19 hours ago, Carol the Dabbler said:

the effect on them would be as though the practice had just started

Yes, and that's why it's so annoying :P

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So you tend to find younger people annoying?

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Tsk tsk, I am more open than you J.P.

I find younger, older than me, same age as me, people who disagree with me, people who wear sunglass indoor, and people who breath too loud annoying.

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Oh, VBS, you are so egalitarian! :P 

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What did you tell her?
I said the sky is blue because of sunlight reflected off the ocean and back into the sky. She didn't believe me.
Anyway, could one of the actual reasons that they grow in number is because some people are simply too lazy to do so? I think there are some percentage of it, I really do, I've seen some lazy parents. Sooo many things to do in raising kids, so take a break from this one since some people say it's not good. Although I wonder if it's easier if they just wore condoms.
Nah, the only reason there are more people with autism is because our knowledge of autism has expanded the past fifty years. So people who were regarded as the weird kid are diagnosed far quicker now. I hope that answers your question.  

 

 

 

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2 hours ago, Fantasy Lover said:

I said the sky is blue because of sunlight reflected off the ocean and back into the sky. She didn't believe me.

Gee, I wonder why?  Don't think you'd get many takers here in Indiana, since we're about a thousand miles from the ocean.  Oh, wait a minute -- it could be the sunlight reflected off of Lake Michigan!

Nah, the only reason there are more people with autism is because our knowledge of autism has expanded the past fifty years. So people who were regarded as the weird kid are diagnosed far quicker now. I hope that answers your question.

I'm sure that's a big part of it (though I suppose there could be other factors as well).  Used to be that celiac disease was thought to be very rare in the US, till an Italian specialist moved here and started doing celiac biopsies during all of his upper-GI exams.  Lo and behold, the rate was the same here as in Italy!  It was just that American doctors a} hadn't really been looking for it, since it was so "rare" and b} were considering only a few very specific symptoms, whereas the disease can cause all sorts of symptoms (or none at all).

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And I believe I've read that it's actually the ocean that's blue because of reflected light (from the sky).  Though the ocean can be all sorts of colors, depending on how deep it is at that spot, what's in the water and/or on the bottom -- and what color the sky is at the time.

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One thing that's always puzzled me about that … when I'm in Maine, and I'm studying the horizon where the water meets the sky, sometimes they're the same color … and sometimes the water is lighter than the sky, and sometimes it's darker. Very mysterious, I have no idea why it happens.

Darker:

5I1sK0p.jpg

 

About the same:

8hYfhLZ.jpg

 

Lighter:

jVxPE8C.jpg

 

Actually, that last one, I do know why the water is lighter, but let's see how observant the rest of you are. :P 

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In the third photo, it looks to me like glare off the water.  In the second one, maybe mist or fog?  And the top one is a nice clear day.  Dunno if those phenomena would always explain it, though.

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13 hours ago, J.P. said:

I said the sky is blue because of sunlight reflected off the ocean and back into the sky

Hey, that's what I learned in elementary school as well! I don't know other real answer actually. 

My question now  why is the ocean blue? Is it the same with the sky is blue explanation?

Underwater, the colors pretty much reflect what we see from the surface. Shallower are would have more cyan hue, while deeper would be bluer.  

8 hours ago, Arcadia said:

Actually, that last one, I do know why the water is lighter, but let's see how observant the rest of you are. :P 

Dang it! For a moment I felt smart.

So you also know that is the surface full of floating silver fish yes?

Nice second picture btw. Looks peaceful.

 

@other stuff

CO2 level is in the highest guys, the last time it hit this level was three million years ago. Shall we grow a fin and breath underwater instead, no.. because they had also found plastic waste in Mariana trench, so no place is spared.

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7 hours ago, Van Buren Supernova said:

My question now  why is the ocean blue? Is it the same with the sky is blue explanation?

Underwater, the colors pretty much reflect what we see from the surface. Shallower are would have more cyan hue, while deeper would be bluer.

I've never seen under the water, so thanks for that info.

As for why the ocean tends to look blue -- OK, first, when the sky is blue, it's because of how the different wavelengths of light are scattered, as in the link that J.P. posted above.  I've always assumed the ocean was merely reflecting the sky, but apparently not -- this article explains that it's basically the same reason as why the sky is blue, different wavelengths of light being absorbed or reflected.

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You can see the surface of the sea is a kind of mirror. It reflects everything that's over it, from your POV. So when the horizon is bright, the water is also bright. With the other photos - it might be similar. 1 -the sun seems to be behind you, 2 - the quite diffuse light seems to come from the side.

I'm guessing. Now it's up to you to find links. :D

 

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Carol and JP are on the right track … in this particular case, the water is lighter because it's mostly reflecting the sky directly overhead … which was pale and cloudless. It's just the dark cloud on the horizon that makes the sky look dark in that photo.

But I've seen times in broad, cloudless daylight where the water is lighter than the sky, I just couldn't find a picture of it. Also I note that the times when the water looks darker than the sky is always on the ocean side of the island … on the bay side, where the water is shallower, the water's more likely to be the same color as the sky. So maybe the sheer depth of the ocean water makes it look darker? But then why does it look just as dark where it rolls up on shore?

Questions like this have been known to keep me awake at night.

1 hour ago, Carol the Dabbler said:

this article explains that it's basically the same reason as why the sky is blue, different wavelengths of light being absorbed or reflected.

There is something missing from that explanation, though … because water only looks blue when the sky is blue. I think. Pretty sure. Change the color of the sky, and the water will change too. Or put something a different color between the water and the sky, and the water will reflect the different color. Unless, as they say, it's full of … things … in which case it won't reflect much at all. Around here, where we mostly have shallow lakes and ponds full of mud and algae, water generally looks green or brown. And coming out of the tap, it looks colorless…. you hope!!!!! :D 

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25 minutes ago, Arcadia said:

... water only looks blue when the sky is blue. I think. Pretty sure. Change the color of the sky, and the water will change too.

When the sky is cloudy, the sunlight is being filtered before it ever reaches the ground.  Judging by my experience of a painful sunburn on a very gray day, ultra-violet light comes through pretty well, and blue has almost as short a wavelength, so you'd think....

However, water often does act as a mirror, so perhaps when there's less light, it's more likely to do so?  Or maybe your memory is being selective?  As you say, shallow water doesn't generally look blue, and I'm rarely around anything deeper than a small pond, so I can't offer much in the way of personal experience.

Though come to think of it, I've seen that shallow seawater that VBS mentioned, and it does tend to be a beautiful shade of turquoise (which I suppose could be a blend of yellow from the sandy bottom and blue from -- whatever makes the ocean look blue), even when it's probably no deeper than the local ponds.  So what do I know?

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I'm amused that you guys actually discussed it :lol4: need new episode eh? I think this quad should be useful to face my nephew back then. He is growing into a teenager now,  I called him out when he complained that his parents asked him too many question. He laughed, and asked how did he expect me to answer all those??? Well I didn't and don't know! It's like creativity test and 'are you sure you don't want children test'. :P

Back to sky.. I'd think water does reflect the sky.

P-20150620-063858.jpg

P-20150621-063717.jpg

P-20150808-061337.jpg

Although for some reasons, probably those you mentioned above, this one adopt purple hue. It's mid of the day, and there was nothing purple around.

P-20150808-152951.jpg

And this one with tint of yellow.

P-20150801-161939.jpg

 

 

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What??? This is a perfectly acceptable subject! At least we're not discussing shoes!

I do know there is a difference between looking across water, and looking down into water, so maybe that's where some of our confusion is coming from. Either way you see a reflection, but looking down you also see whatever the water is lying on, etc. Or to put it the other way round; if you can get the correct viewing angle on a muddy puddle, it will reflect the blue sky too. Or whatever color the sky is.

But we still haven't explained why the ocean water looks darker than the sky above it. This is important, folks, inquiring minds need to know. Maybe we should sic Julian Assange on it. 

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I wouldn't trust photographs. They lie.

There is a waves-factor, the reflection-factor (sun position, light intensity, whatsnot), but there is definitely a color the water has. It can be brown-yellowish, blue, green, probably depending on stuff dissolved in it, algae, etc. Marsh water is dark and brown like tea. The river that flew through the town of my birth was actually opaque-grey, like liquid graphite from all the coal dust and sewage in it.

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According to my high-school chemistry book, water is a colorless, odorless, tasteless liquid.  The author obviously never lived in Terre Haute, Indiana.

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Okay, I'm sure you all know this, but just in case … you all do know that it's the stuff IN the water that has the odor, taste and color, right? Not the water itself, right? Right? :D Just checking....

 

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I'm amused that you guys actually discussed it 4: need new episode eh?
I'm sorry, it's totally my fault.
Gee, I wonder why?  Don't think you'd get many takers here in Indiana, since we're about a thousand miles from the ocean.  Oh, wait a minute -- it could be the sunlight reflected off of Lake Michigan!
I know that's not the real reason! It's just that the conversation we had before she asked that question was pretty weird, I'm pretty sure she was high.   

 

 

It went like this: "Excuse me, can I ask you a question?" Me thinking she's ordinary beggar "Sure." "What do you study?" Me confused "Office management." Oh, then you can't help me." "With what do you need help?" "I'm wondering why the sky is blue. Every time I go outside it's blue." Me completely bewildered says the first thing to pop in my head "It's because it reflects the water." "I don't think so, does it have another colour besides blue? I'm thinking about contacting the local weatherman to ask him about that." Me completely creeped out at that point and just wanting to leave "Yes. Black, red and orange." and then I left.

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Don't you love it when you try to be nice to a stranger and it turns into weirdness? :D 

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5 hours ago, Fantasy Lover said:

"I'm wondering why the sky is blue. Every time I go outside it's blue."

Maybe it would be better to answer "because there are no clouds"? run.gif

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17 hours ago, Arcadia said:

Don't you love it when you try to be nice to a stranger and it turns into weirdness? :D 

There's a moral in there somewhere.

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